Stonehenge is one of the world's most famous and enigmatic prehistoric monuments, located on the Salisbury Plain in Wiltshire. Built in several stages starting over 5,000 years ago, this UNESCO World Heritage site consists of a ring of massive standing stones that align with the midwinter and midsummer solstices. Its purpose remains a subject of intense archaeological debate—serving perhaps as a burial site, a place of healing, or a celestial calendar. Today, it is a premier global social and educational destination, drawing visitors from every corner of the earth to marvel at its architectural mystery and the ingenuity of the ancient people who built it.